caa a22 4500 469095717 CHVBK 20180323133030.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00317270 doi (NATIONALLICENCE)springer-10.1007/BF00317270 Water utilization of tropical hardwood hammocks of the Lower Florida Keys [Elektronische Daten] [Naomi Ish-Shalom, Leonel Sternberg, Michael Ross, Joseph O'Brien, Laura Flynn] Summary: Predawn water potential of representative plant species, together with stable isotope composition of stem water and potential water sources were investigated in four low-elevation tropical hardwood hammocks in the Lower Florida Keys, during a one year period. Hammock species had the lowest water potentials when soil water content was low and/or soil salinity was high, but differences in groundwater salinity had no effect on the water potential. Comparison of D/H ratio of plant stem water with soil and ground water corroborates the conclusion that they are primarily utilizing soil water and not groundwater. Thus, tropical hardwood hammocks are buffered from saline groundwater, and are able to thrive in areas where groundwater salinity is as high as 25‰. The effect of sea level rise on these forests may depend more on changes in the frequency of tidal inundation of the soil surface than on changes in groundwater salinity. Springer-Verlag, 1992 Tropical hardwood hammock nationallicence Salinity nationallicence Stable isotope ratio nationallicence Water relations nationallicence Groundwater nationallicence Ish-Shalom Naomi Department of Biology, University of Miami, P.O. Box 249118, 33124, Coral Gables, FL, USA aut Sternberg Leonel Department of Biology, University of Miami, P.O. Box 249118, 33124, Coral Gables, FL, USA aut Ross Michael National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut O'Brien Joseph National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut Flynn Laura National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut Oecologia Springer-Verlag 92/1(1992-10-01), 108-112 0029-8549 92:1<108 1992 92 442 https://doi.org/10.1007/BF00317270 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317270 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ish-Shalom Naomi Department of Biology, University of Miami, P.O. Box 249118, 33124, Coral Gables, FL, USA aut NATIONALLICENCE 700 1- Sternberg Leonel Department of Biology, University of Miami, P.O. Box 249118, 33124, Coral Gables, FL, USA aut NATIONALLICENCE 700 1- Ross Michael National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut NATIONALLICENCE 700 1- O'Brien Joseph National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut NATIONALLICENCE 700 1- Flynn Laura National Audubon Society, 115 Indian Mound Trail, 33070, Tavernier, FL, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/1(1992-10-01), 108-112 0029-8549 92:1<108 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer